.travis.yml in countries-2.0.0.pre.4 vs .travis.yml in countries-2.0.0.rc

@@ -1,11 +1,10 @@
 sudo: false
 cache: bundler
 language: ruby
 rvm:
- - 1.9.3
- - 2.0.0
  - 2.2.3
+ - 2.3.1
  - ruby-head
 before_install:
   - gem update --system
   - gem install bundler --pre
 matrix: